LM13700N National Semiconductor, LM13700N Datasheet

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LM13700N

Manufacturer Part Number
LM13700N
Description
Operational Amplifier (Op-Amp) IC
Manufacturer
National Semiconductor
Datasheets

Specifications of LM13700N

No. Of Amplifiers
2
Slew Rate
50V/µs
No. Of Pins
16
Peak Reflow Compatible (260 C)
No
Input Bias Current
1µA
Supply Voltage
36V
Output Current
20mA
Input Offset Voltage Max
4mV
Gain
2dB
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LM13700N
Manufacturer:
NS/国半
Quantity:
20 000
© 1999 National Semiconductor Corporation
LM13700/LM13700A
Dual Operational Transconductance Amplifiers with
Linearizing Diodes and Buffers
General Description
The LM13700 series consists of two current controlled
transconductance amplifiers, each with differential inputs
and a push-pull output. The two amplifiers share common
supplies but otherwise operate independently. Linearizing di-
odes are provided at the inputs to reduce distortion and allow
higher input levels. The result is a 10 dB signal-to-noise im-
provement referenced to 0.5 percent THD. High impedance
buffers are provided which are especially designed to
complement the dynamic range of the amplifiers. The output
buffers of the LM13700 differ from those of the LM13600 in
that their input bias currents (and hence their output DC lev-
els) are independent of I
superior to that of the LM13600 in audio applications.
Features
n g
Connection Diagram
m
adjustable over 6 decades
ABC
. This may result in performance
Order Number LM13700M, LM13700N or LM13700AN
Dual-In-Line and Small Outline Packages
DS007981
See NS Package Number M16A or N16A
Top View
n Excellent g
n Excellent matching between amplifiers
n Linearizing diodes
n High impedance buffers
n High output signal-to-noise ratio
Applications
n Current-controlled amplifiers
n Current-controlled impedances
n Current-controlled filters
n Current-controlled oscillators
n Multiplexers
n Timers
n Sample-and-hold circuits
m
linearity
DS007981-2
www.national.com
May 1998

Related parts for LM13700N

LM13700N Summary of contents

Page 1

... ABC superior to that of the LM13600 in audio applications. Features n g adjustable over 6 decades m Connection Diagram Dual-In-Line and Small Outline Packages Order Number LM13700M, LM13700N or LM13700AN © 1999 National Semiconductor Corporation DS007981 n Excellent g linearity m n Excellent matching between amplifiers n Linearizing diodes n High impedance buffers ...

Page 2

... Note 1: “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. ± Note 2: For selections to a supply voltage above www.national.com (Note 1) Operating Temperature Range LM13700N, LM13700AN DC Input Voltage Storage Temperature Range Soldering Information Dual-In-Line Package ± ...

Page 3

... Note 3: For operation at ambient temperatures above 25˚C, the device must be derated based on a 150˚C maximum junction temperature and a thermal resistance, junction to ambient, as follows: LM13700N, 90˚C/W; LM13700M, 110˚C/W. Note 4: Buffer output current should be limited not exceed package dissipation. ...

Page 4

Typical Performance Characteristics Peak Output Current DS007981-41 Input Leakage DS007981-44 Amplifier Bias Voltage vs Amplifier Bias Current DS007981-47 www.national.com (Continued) Peak Output Voltage and Common Mode Range DS007981-42 Transconductance DS007981-45 Input and Output Capacitance DS007981-48 4 Leakage Current DS007981-43 Input ...

Page 5

Typical Performance Characteristics Distortion vs Differential Input Voltage DS007981-50 Leakage Current Test Circuit Circuit Description The differential transistor pair Q and Q form a transcon ductance stage in that the ratio of their collector currents is defined by ...

Page 6

Circuit Description (Continued) Q and Q , all transistors and diodes are identical in size Transistors Q and Q with Diode D form a current mirror which forces the sum of currents I and I ...

Page 7

Applications: Voltage Controlled Amplifiers (Continued) maximizes their linearizing action when balanced against value recommended for cific application demands otherwise. FIGURE 2. Voltage Controlled Amplifier FIGURE 3. Equivalent VCA Input Circuit ...

Page 8

Stereo Volume Control www.national.com (Continued) FIGURE 4. Stereo Volume Control FIGURE 5. Amplitude Modulator 8 DS007981-11 DS007981-12 ...

Page 9

Stereo Volume Control (Continued) Noting that the gain of the LM13700 amplifier of Figure 3 may be controlled by varying the linearizing diode current I as well as by varying I , Figure 7 shows an AGC Amplifier ABC using ...

Page 10

Voltage Controlled Resistors FIGURE 8. Voltage Controlled Resistor, Single-Ended FIGURE 9. Voltage Controlled Resistor with Linearizing Diodes Voltage Controlled Filters OTA’s are extremely useful for implementing voltage con- trolled filters, with the LM13700 having the advantage that the required buffers ...

Page 11

Voltage Controlled Filters FIGURE 10. Floating Voltage Controlled Resistor FIGURE 11. Voltage Controlled Low-Pass Filter (Continued) 11 DS007981-17 DS007981-18 www.national.com ...

Page 12

Voltage Controlled Filters FIGURE 12. Voltage Controlled Hi-Pass Filter FIGURE 13. Voltage Controlled 2-Pole Butterworth Lo-Pass Filter www.national.com (Continued) 12 DS007981-19 DS007981-20 ...

Page 13

Voltage Controlled Filters FIGURE 14. Voltage Controlled State Variable Filter Voltage Controlled Oscillators The classic Triangular/Square Wave VCO of Figure 15 is one of a variety of Voltage Controlled Oscillators which may be built utilizing the LM13700. With the component ...

Page 14

Voltage Controlled Oscillators www.national.com (Continued) FIGURE 15. Triangular/Square-Wave VCO FIGURE 16. Ramp/Pulse VCO 14 DS007981-22 DS007981-23 ...

Page 15

Voltage Controlled Oscillators Figure 18 shows how to build a VCO using one amplifier when the other amplifier is needed for another function. FIGURE 18. Single Amplifier VCO (Continued) FIGURE 17. Sinusoidal VCO Additional Applications Figure 19 presents an interesting ...

Page 16

Additional Applications The operation of the multiplexer of Figure 20 is very straight- forward. When A1 is turned on it holds V when A2 is supplied with bias current then it controls V and R serve to stabilize the unity-gain ...

Page 17

Additional Applications (Continued) The Schmitt Trigger of Figure 22 uses the amplifier output current into R to set the hysteresis of the comparator; thus = Varying I will produce a Schmitt Trigger with ...

Page 18

Additional Applications Figure 23 shows a Tachometer or Frequency-to-Voltage con- verter. Whenever A1 is toggled by a positive-going input, an amount of charge equal to (V – sourced into This once ...

Page 19

Additional Applications (Continued) DS007981-32 FIGURE 25. Sample-Hold Circuit FIGURE 26. Ramp and Hold 19 DS007981-33 www.national.com ...

Page 20

Additional Applications The circuit of Figure voltage reference of variable Temperature Coefficient. The 100 k potentiometer adjusts the output voltage which has a positive TC above 1.2V, zero TC at about 1.2V, and negative TC below 1.2V. ...

Page 21

Additional Applications (Continued) FIGURE 28. Delta VBE Reference FIGURE 29. Pulse Width Modulator 21 DS007981-35 DS007981-36 www.national.com ...

Page 22

Additional Applications www.national.com (Continued) FIGURE 30. Logarithmic Current Source 22 DS007981-37 ...

Page 23

... Physical Dimensions inches (millimeters) unless otherwise noted Order Number LM13700N or LM13700AN S.O. Package (M) Order Number LM13700M NS Package Number M16A Molded Dual-In-Line Package (N) NS Package Number N16A 23 www.national.com ...

Page 24

... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...

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